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<TITLE>JavaScript Source Code 3000:  BG Effects:  Random Background</TITLE>
<META HTTP-EQUIV="JavaScript Source Code 3000" CONTENT = "no-cache">
<META NAME="date" CONTENT="2000-09-09">
<META NAME="channel" CONTENT="Web Developer">
<META NAME="author" CONTENT="JavaScript Source Code 3000">
<META NAME="section" CONTENT="BG Effects">
<META NAME="description" CONTENT="Get a random background color with the touch of a button.  This script uses 15 pre-determined background colors and then randomly chooses one.  This is a great effect if you know what background colors don't interfere with the text on your page.  Then, you can make them the 15 pre-determined background colors.">

<SCRIPT LANGUAGE="JavaScript">
<!--
function backcolor(form) {
temp = ""
for (var i = 0; i < 16; i++) {
temp = form.color[i].value
if (form.color[i].checked){ document.bgColor = temp }
   }
}
function randombackground() {
document.bgColor = getColor()
}
function getColor(){
currentdate = new Date()
backgroundcolor = currentdate.getSeconds()
if (backgroundcolor > 44)
backgroundcolor = backgroundcolor - 45
else if (backgroundcolor > 29)
backgroundcolor = backgroundcolor - 30
else if (backgroundcolor > 15)
backgroundcolor = backgroundcolor - 16
if (backgroundcolor == 0 )
return "olive";
else if (backgroundcolor == 1 )
return "teal";
else if (backgroundcolor == 2 )
return "red";
else if (backgroundcolor == 3 )
return "blue";
else if (backgroundcolor == 4 )
return "maroon";
else if (backgroundcolor == 5 )
return "navy";
else if (backgroundcolor == 6 )
return "lime";
else if (backgroundcolor == 7 )
return "fuschia";
else if (backgroundcolor == 8 )
return "green";
else if (backgroundcolor == 9 )
return "purple";
else if (backgroundcolor == 10 )
return "gray";
else if (backgroundcolor == 11 )
return "yellow";
else if (backgroundcolor == 12 )
return "aqua";
else if (backgroundcolor == 13 )
return "black";
else if (backgroundcolor == 14 )
return "white";
else if (backgroundcolor == 15 )
return "silver";
}
// End -->
</SCRIPT>
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<B><FONT SIZE="+2" FACE="Helvetica,Arial" ALIGN=RIGHT COLOR="#0000FF">
<b><A HREF="../index.htm" /" TARGET="_top">
Home</A> </b><img src="../img/arrow.gif" /img/arrow.gif" height=13 width=7 border=0 alt="}"> <b><A HREF="index.htm" /bgeffects/"><font color="#FF0000">Background Effects</font></A> </b>
<img src="../img/arrow.gif" /img/arrow.gif" height=13 width=7 border=0 alt="}"> <FONT COLOR="#006666">Random Background</FONT></b></FONT><BR>
</B><BR>
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<tr><td><font FACE="helvetica,arial,geneva">
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<!-- Description --><!--content_start-->

Get a random background color with the touch of a button.  This script uses 15 pre-determined background colors and then randomly chooses one.  This is a great effect if you know what background colors don't interfere with the text on your page.  Then, you can make them the 15 pre-determined background colors.
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<hr>
</td></tr>
</table>
<!-- Demonstration -->
<CENTER>
<FORM>
<input type="button" value="Get Another Random Background" onClick="randombackground()">
</FORM>
</CENTER>
<P>
<P>
<a name="source">
<table BORDER=0 WIDTH=486 CELLPADDING=3 CELLSPACING=0>
<tr><td BGCOLOR=yellow><font FACE="helvetica,arial,geneva"><b>JavaScript Source Code 3000:  BG Effects:  Random Background</b>
<p>Simply click inside the window below, use your cursor to highlight the script, and copy (type Control-c or Apple-c) the script into a new file in your text editor (such as Note Pad or Simple Text) and save (Control-s or Apple-s).  The script is yours!!!<br><br></font></td></tr>
<tr><td BGCOLOR=yellow ALIGN=CENTER>
<form NAME="copy">

<DIV align="center">
<input type=button value="Highlight All" onClick="javascript:this.form.txt.focus();this.form.txt.select();">&nbsp;&nbsp;&nbsp;&nbsp;
<INPUT TYPE="text" NAME="total" VALUE="Script Size:  2.00 KB  " size="24">
</DIV>

<textarea NAME="txt" ROWS=20 COLS=75 WRAP=VIRTUAL>

&lt;!-- TWO STEPS TO INSTALL RANDOM BACKGROUND:

   1.  Add the designated script to the HEAD of your HTML document
   2.  Place the last script into the BODY of your HTML document  --&gt;
		  
&lt;!-- STEP ONE:  Add this script to the HEAD of your HTML document  --&gt;

&lt;HEAD&gt;

&lt;SCRIPT LANGUAGE="JavaScript"&gt;

&lt;! &gt;
&lt;! &gt;

&lt;!-- Begin
function backcolor(form) {
temp = ""
for (var i = 0; i &lt; 16; i++) {
temp = form.color[i].value
if (form.color[i].checked){ document.bgColor = temp }
   }
}
function randombackground() {
document.bgColor = getColor()
}
function getColor(){
currentdate = new Date()
backgroundcolor = currentdate.getSeconds()
if (backgroundcolor &gt; 44)
backgroundcolor = backgroundcolor - 45
else if (backgroundcolor &gt; 29)
backgroundcolor = backgroundcolor - 30
else if (backgroundcolor &gt; 15)
backgroundcolor = backgroundcolor - 16
if (backgroundcolor == 0 )
return "olive";
else if (backgroundcolor == 1 )
return "teal";
else if (backgroundcolor == 2 )
return "red";
else if (backgroundcolor == 3 )
return "blue";
else if (backgroundcolor == 4 )
return "maroon";
else if (backgroundcolor == 5 )
return "navy";
else if (backgroundcolor == 6 )
return "lime";
else if (backgroundcolor == 7 )
return "fuschia";
else if (backgroundcolor == 8 )
return "green";
else if (backgroundcolor == 9 )
return "purple";
else if (backgroundcolor == 10 )
return "gray";
else if (backgroundcolor == 11 )
return "yellow";
else if (backgroundcolor == 12 )
return "aqua";
else if (backgroundcolor == 13 )
return "black";
else if (backgroundcolor == 14 )
return "white";
else if (backgroundcolor == 15 )
return "silver";
}
// End --&gt;
&lt;/SCRIPT&gt;

&lt;!-- STEP TWO:  Put this form in the BODY of the HTML document  --&gt;

&lt;BODY&gt;

&lt;CENTER&gt;
&lt;FORM&gt;
&lt;input type="button" value="Get Another Random Background" onClick="randombackground()"&gt;
&lt;/FORM&gt;
&lt;/CENTER&gt;

 

&lt;!-- Script Size:  2.00 KB  --&gt;
</textarea><br><font FACE="helvetica,arial,geneva"></font></td></tr>

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</form>
</FONT>
</CENTER>


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